In 2006, Davis guest-starred in an episode of the comedy series Extras, in an episode in which Daniel Radcliffe, played himself, performed a spoof of Harry Potter; Davis (also appearing as himself) played a magical creature in the spoof.

He also guest-starred in the episode "The Eye of the Phoenix" on BBC's Merlin as the mystical Grettir, gatekeeper to the land of the Fisher King.

He also played the Leprechaun in the six Leprechaun films.

He is currently starring as himself in the Ricky Gervaiss mockumentary Life's Too Short

Behind the scenes

The second "w" in his first name is silent.

His appearance as Flitwick changed in the Prisoner of Azkaban from being an extremely older looking man in the first two movies, to a much younger man. The films have yet to address the reason for the change in appearance (which does not occur at all to Flitwick in the books).

His grandmother heard an announcement on the radio calling for people under 4 feet in height to audition for Star Wars: Return of the Jedi. He went and auditioned and received a role as an ewok. When actor Kenny Baker got a bad case of food poisoning on the day they were to film Wicket meeting Princess Leia for the first time, Warwick's role was made into the main ewok character Wicket, the lead Ewok.